南宁市空气中细颗粒物污染水平及其与气象因素的关系

The PM2.5 Pollution Level in Nanning and Its Relationship with Weather Factors

关键词:  细颗粒物  污染水平  气象特征

Key words:  PM_2.5  pollution level  weather factors

摘要:

分别于2010年1月和3月在南宁市城中心区的市监测站、文教区的区农校、工业区的英华嘉园、城市郊区的仙葫,应用自动监测仪器监测空气颗粒物的浓度,并分析监测站点位细颗粒物浓度随季节的变化及其与日平均气温、风速和降雨量等气象因素的关系。结果发现,1月份和3月份南宁市城市中心区域的细颗粒物浓度高于郊区的,城市区域范围内则以下风向区域的浓度水平最高;细颗粒物的污染水平与季节有关系,冬季期间中细颗粒物占粗颗粒物的比例明显大于春季的比例;空气中的细颗粒物的浓度受到降雨、气温以及风速等气象因素的影响。

Abstract:

The automatic equipments was used to monitor the air particulate matter concentration in the Nanning Environmental Protection Monitoring Station which was in the central area,the District agricultural school which was in the Cultural district,Yinghua jiayuan which was in the Industrial zone,and Xianhu which was in the Suburbs.The relationship of PM_2.5 pollution concentration in monitoring stations and its change with different season,the daily average temperature,wind speed,rainfall and other weather factors was discussed.Results showed that in January and March,the concentration of PM_2.5 in the central of the city was higher than the Suburbs and the highest area was located in the downwind of the city.The level of PM_2.5 was closely related to the season.PM_2.5 in winter accounted for the proportion of PM₁₀ was larger than the ratio in the spring and PM_2.5 in the air was affected by the rainfall,air temperature,wind speed and other weather factors.